/*
 * @Author: fisher
 * @Date: 2024-02-26 11:09:16
 * @LastEditors: luthor luthor-li@qq.com
 * @LastEditTime: 2024-03-10 02:41:07
 * @FilePath: \allback\services\ueinstanceService.js
 * @Description:
 */
// services/ueInstanceService.js
const { execSync } = require('child_process')
const fs = require('fs-extra')
const path = require('path')
const UeInstance = require('../models/ueinstanceModel') // 导入你的Mongoose模型
const UefileModel = require('../models/uefileModel')
const { copysignalling, generateStartconfig } = require('../utils/ueconfig')
const {
  addUserConnection,
  removeUserConnection,
  callSignalCloseClient
} = require('../utils/ueClient')
const wsService = require('./wsService')

/**
 * @description: 创建实例
 * @param {*} data
 * @return {*}
 */
const createInstance = async data => {
  const duplicate = await UeInstance.findOne({
    $or: [{ name: data.name }, { port: data.port }]
  })
  if (duplicate) {
    throw new HttpError('已存在相同名称或端口的实例！', 409)
  }
  const instanceData = {
    instanceIp: process.env.HOST,
    ...data
  }
  const instance = new UeInstance(instanceData)
  await instance.save()
  // 创建实例后，对应复制一份信令服务器
  copysignalling(instance)
  return instance
}

/**
 * @description: 根据id获得实例数据
 * @param {*} id
 * @return {*}
 */
const getInstanceById = async id => {
  const instance = await UeInstance.findById(id)
  return instance
}

/**
 * @description: 分页查询实例列表
 * @param {*} pageSize
 * @param {*} pageNo
 * @param {*} search
 * @return {*}
 */
const getInstanceList = async (pageSize, pageNo, search) => {
  try {
    const query = {}
    // 设置默认的分页参数
    pageNo = parseInt(pageNo) || 1
    pageSize = parseInt(pageSize) || 10
    const skip = (pageNo - 1) * pageSize
    if (search) {
      query.name = new RegExp(search, 'i') // 用于模糊搜索的正则表达式
    }
    // 计算总记录数
    const total = await UeInstance.countDocuments(query)
    // 获得分页数据
    const records = await UeInstance.find(query)
      .sort({ createdAt: -1 })
      .skip(skip)
      .limit(pageSize)
      .exec()
    return { records, total }
  } catch (err) {
    throw new HttpError('查询错误！', 400)
  }
}

const updateInstanceById = async (id, updates) => {
  const updatedInstance = await UeInstance.findByIdAndUpdate(id, updates, {
    new: true
  })
  return updatedInstance
}

/**
 * @description: 删除实例
 * @param {*} ids
 * @return {*}
 */
const deleteInstance = async ids => {
  try {
    // 删除实例
    // 根据id查询数据
    const deleteData = await UeInstance.find({ _id: { $in: ids } }).exec()
    // 删除pm2进程
    let deleteStr = ''
    deleteData.forEach(item => {
      // 当存在runTimestamp,说明该实例已经运行过,在pm2中注册了进程.
      if (item.runTimestamp) {
        // 根据实例信息，分别获取信令服务名称和ue服务名称
        deleteStr += `server_${item._id} ue_${item._id} `
      }
    })
    // 当删除数据字符串存在时，才进行pm2删除
    if (deleteStr) {
      const deleteCmd = `pm2 delete ${deleteStr}`
      execSync(deleteCmd)
    }
    // 删除实例信令服务克隆体
    for (let i = 0, len = deleteData.length; i < len; i++) {
      const deletePath = path.resolve(
        __dirname,
        `../UESERVER/pixelstream/${deleteData[i].name}`
      )
      await fs.remove(deletePath)
    }
    // 删除数据库记录
    await UeInstance.deleteMany({ _id: { $in: ids } })
  } catch (err) {
    throw new HttpError(err.message, 400)
  }
}

const startInstances = async ids => {
  try {
    // 获取启动实例数据
    const instances = await UeInstance.find({ _id: { $in: ids } })
    // 生成实例启动配置文件
    const config = []
    // 根据实例绑定的uefile id去获取uefile数据
    for (let i = 0, len = instances.length; i < len; i++) {
      const id = instances[i].projectId
      const uefiles = await UefileModel.findById(id)
      config.push({
        id: instances[i]._id,
        instanceName: instances[i].name,
        instanceIp: instances[i].instanceIp,
        instancePort: instances[i].port,
        ueName: uefiles.name,
        uePath: uefiles.path
      })
    }
    const configPath = await generateStartconfig(config)
    if (configPath) {
      // 根据启动配置文件启动实例列表
      const startCmd = `pm2 start ${configPath}`
      execSync(startCmd)
      // 启动后更新实例数据
      const filter = { _id: { $in: ids } }
      const update = { $set: { runStatus: true, runTimestamp: Date.now() } }
      await UeInstance.updateMany(filter, update)
    } else {
      throw new HttpError('启动失败！', 400)
    }
  } catch (err) {
    throw new HttpError(err.message, 400)
  }
}
/**
 * @description: 停止实例，可多个
 * @param {*} ids
 * @return {*}
 */
const stopInstances = async ids => {
  try {
    // 获取所有需要停止的实例信息
    const instances = await UeInstance.find({ _id: { $in: ids } })
    // 循环遍历停止实例
    for (let i = 0, len = instances.length; i < len; i++) {
      // 当存在运行时间戳时表示此实例已经运行过，在pm2中已经注册了进程。
      if (instances[i].runTimestamp && instances[i].runStatus) {
        // 根据实例id,停止pm2中对应ue、信令进程
        const stopCmd = `pm2 stop server_${instances[i]._id} ue_${instances[i]._id}`
        execSync(stopCmd)
        // 计算运行时长
        const runtime = Date.now() - instances[i].runTimestamp
        // 停止实例后，更新数据
        const filter = { _id: instances[i]._id }
        const update = {
          $set: {
            runStatus: false,
            totalRuntimes: instances[i].totalRuntimes + runtime,
            connectStatus: false,
            connections: []
          }
        }
        // 更新数据库中所有 runStatus 为 true 的文档，将 runStatus 设置为 false
        await UeInstance.updateOne(filter, update)
      }
    }
  } catch (err) {
    throw new HttpError(err.message, 400)
  }
}

/**
 * @description: 获取所有进程运行状态
 * @return {*}
 */
const getInstanceStatus = async () => {
  try {
    const listCmd = `pm2 jlist`
    const status = execSync(listCmd)
    return status
  } catch (err) {
    throw new HttpError(err.message, 400)
  }
}

const msgBySignal = async (
  instanceId,
  userId,
  playerId,
  clientIp,
  signalHost,
  signalPort,
  useHttps,
  connectStatus
) => {
  if (connectStatus) {
    const data = {
      userId,
      playerId,
      clientIp,
      signalHost,
      signalPort,
      useHttps
    }
    await addUserConnection(instanceId, data)
  } else {
    await removeUserConnection(instanceId, userId)
  }

  // 执行完更新操作后，发送websockt信息
  wsService.broadcastMessage({
    type: 'watch',
    data: {
      target: 'ueinstance',
      key: 'connectChange',
      message: '更新实例连接状态'
    }
  })
}
const closeClient = async (instanceId, connectionId) => {
  try {
    const instance = await UeInstance.findById(instanceId)
    if (instance) {
      const connectData = instance.connections.find(
        item => item._id == connectionId
      )
      if (connectData) {
        //根据获取到的connect数据去调用关闭客户端的方法
        const res = await callSignalCloseClient(instanceId, connectData)
        return res
      }
    }
  } catch (err) {
    throw new HttpError(err.message, 400)
  }
}
module.exports = {
  createInstance,
  getInstanceById,
  getInstanceList,
  updateInstanceById,
  deleteInstance,
  startInstances,
  stopInstances,
  // stopInstanceByid,
  getInstanceStatus,
  msgBySignal,
  closeClient
}
